I'm really happy that at last Mr Ahmadinajad was given the chance to show his true colours. Mr Mousavi won this debate - further proven by the fact Ahmadinajad couldn't score any points off him. Ahmadinejad's behaviour was totally uncivilised and childish. Azam, Tehran

It was really funny, they both really let the cat out of the bag! I was actually supporting Mir Hossien Mousavi, but now I am not sure. Does Mousavi mean he doesn't believe Iran can be friends with the people of Israel? And is Akbar Hashemi really behind Mousavi? Because I think he is one of the most corrupt people in the Islamic republic of Iran. Kamyar

Until I saw the debate I had decided I was going to vote for Mousavi, and I didn't even want to see Ahmadinejad's face. But, having heard the debate I am now a supporter of Ahmadinejad. He is the only one who feels for this nation and although I hated him until tonight, I actually really like him now. Elham

How frightening! I think we may have Ahmadinejad for another four years! Although he was bad-mouthing some other officials, he didn't reveal anything we didn't already know. Unfortunately, I think overall Ahmadinejad was successful in diverting public attention from the problems he has created in the past four years. Mr Mousavi wasn't prepared for this and he is not a suitable candidate for the reformists. He will let them down in the elections. Saba

I think Mousavi was the winner in this debate. Ahmadinejad tried to divert Mousavi with his questions, but Mousavi won. Bahram, Shiraz

Emails sent to English language BBC website

I am a fan of Mr Mousavi. That had never stopped me from respecting other candidates until last night! It was way out of character for a president to act like a kid and accuse people who are not present by name. He seemed to be high on something the way he debated with nervous tics. Mr Mousavi, stayed calm throughout the first part, asking the president not to focus on others but him. However, he got all fired up when the president showed a picture of his wife and accused her of "not deserving" the Phd degree she has. In a male-dominated country like ours, targeting a woman as a "weak party" of a man is seen as an unchivalrous and is very much detested.Proshat, Tehran

I think Mr Mousavi won the debate by being patient and reasonable. Ahmadinejad - like a showman - mocked Mr Mousavi and tried to make him nervous. However Mr Mousavi stayed calm and was like a teacher who listens to his student, giving him a political lesson that one who is in such a position shouldn't talk and play like a child. Also, Mr Mousavi let people judge for themselves what Ahmadinejad was saying. I think this was our first attempt at TV democracy.Mani H, Tehran - Iran

I believe that Mr Ahmadinejad's speech was not totally based on fact. He accused Mr Mousavi's wife - who is an accepted and well-known politics Professor in Iran - of not having the right qualifications for her post! Which is a pure lie. And there was other stuff which the current Iranian President mentioned that in reality cannot be proved.Fariborz Ghavamian, Tehran - Iran

Viva Ahmadinejad. Two thing were clear last night: Mousavi had no programme for country. Mousavi couldn't answer Ahmadinejad's questions. Ahmadinejad did what nobody in the republic has done before. He crossed the red lines of powerful men who rob people. Ali, Qazvin

Great debate, Mr Mousavi I thought came off worst as Mr Ahmadinejad had statistics and was able to quote and demonstrate the improvement in Iranian society. Mr Mousavi in his role in previous government did not allow media reporting that has been seen in Mr Ahmadinejad's presidency. 1 - 0 to Mr. Ahmadinejad. Mr Mousavi looked out of his depth. Nadeem, Manchester, UK

It was absolotely great. It was the first time that two politicians had a serious debate. Astonishingly, they crossed some "red lines". I don't agree with the writer of this article. I think although Ahmadinejad was successful to some extent, Mr Mousavi won it through good time management and also through Ahmadinejad's big mistake of lying! Mohammad, Tehran

It was great. Both candidates betrayed each other's fraud and corruption in the ex-presidency periods. During these 31 years, our governments have always emphasized that we have a unique Islamic revolution, with no bribery, cheating, and corruption, while in only 90 minutes of TV, the dark side of this regime was shown to the world.Alireza, Tehran & Iran

Mr Mousavi is the best person and the most eligible one. I hope he wins the poll. During the debate, Mr Ahmadinejad could not criticize Mr Mousavi but instead he accused Mr Hashemi, Mr Khatami and Ms Rahnavrad. It was shameful behaviour which I don't think anyone would expect from a national president. Asal, Tehran

I am a fan of Mr Mousavi. That had never stopped me from respecting other candidates until last night! It was way out of character for a president to act like a kid and accuse people who are not present by name. He seemed to be high on something the way he debated with nervous tics. Mr Mousavi, stayed calm throughout the first part, asking the president not to focus on others but him. However, he got all fired up when the president showed a picture of his wife and accused her of "not deserving" the PHD degree she has. In a male-dominated country like ours, targeting a woman as a "weak party" of a man is seen as an un-chivalrous and is very much detested.Proshat, Tehran

The most important issue is that the Iranians should be able to freely elect their representatives; no one in universe (including God) may prohibit Iranians to exercise this freedom of choice. As long as Mr Khamenei gives himself the divine right to interfere and impose his personal will on 70 million people, there can not be any good future for Iranians.Nusratollah, Stockholm, Sweden

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